Help me please I am having a very difficult time right now

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y < 4x − 8 y is greater than or equal to negative 5 over 2 times x plus 5 part a: describe the graph of the system, including shading and the types of lines graphed. provide a description of the solution area. (6 points) part b: is the point (5, −8) included in the solution area for the system? justify your answer mathematically. (4 points)